Soak Black gram dal(urad dal) and rice overnight or for about 5-6 hours. Drain the water and grind to a thick dosa batter. Add salt and set aside.In a pan heat up ghee, add grated pumpkin and saute till the raw smell leaves. To this add Jaggery, coconut, cardamom powder and mix well. Cook till moisture dries up completely. The mixture should be such that it can be made to small lemon size balls.Remove the mixture from heat and let it cool. Make small balls, dip them in the dosa batter gently so that the ball is completely covered by the batter. Drip off excess batter and deep fry in oil till golden colour. Serve warm.